Bad Samaritan

Sean Falco (Robert Sheehan), a poor restaurant valet, uses the cars entrusted to him by the restaurant clientele to break into their homes. One night, he finds more than he bargained when he breaks into one house, only to discover a woman named Katie (Kerry Condon) imprisoned there. Frightened of going to jail, he abandons her and calls the police, only to find himself in a game of cat-and-mouse with Cale Erendreich (David Tennant), the psychotic home owner. Read more on Wikipedia.